BACKGROUND:Dr. Shroobs maintain the Vim Factory in Toadwood Forest. Because intruders weren't expected to actually get inside, and due to their nature, they weren't good in combat, but were armed. Dr. Shroobs also took care of Swiggler, the creature who aided in powering the Shroob UFOs.
Dr. Shroobs are generally intelligent and tech-savvy. They were all destroyed, however, when the Hydrogush 4000 showered baby tears (ugh) on the past world, erasing Shroobs effectively.